🌐EnglishEnglishEspañolFrançaisTürkçeРусскийEntityQ18415473· pop 5· linked from 3 articlesBuchdahl's theoremtheorem in general relativityAvailable in 5 languagesEspañolFrançaisРусскийBanglavia Wikidata sitelinks · CC0ConnectionsBlack holeConceptInternational Standard Book NumberEntityCategories1959 in scienceEnergy (physics)Mathematical theorems